Robin DR400/180 stick back at start of the roll

[A and C]

Mr Enthusiast

The symptoms you write about have all the signs of mis -servicing of the landing gear shock struts, the likely reason for the inadequate propeller clearance is an insufficient amount of oil in the nose shock strut, the result is the spring rate fails to rise fast enough to maintain the propeller clearance. ( with the added safety if all the air is lost and a hydrulic lock stopping the leg from fully compressing to maintain a minimum safe clearance )

Robin would not build an aircraft that did not have enough propellor clearance, unfortunately they can't legislate for the idiots who don't read the maintenance manual and fail to service the landing gear in accordance with the published data.